Adds a detailed README file for the Best 2048 project.
The README includes:
- Project description and context (university project).
- List of features for both single-player and multiplayer modes.
- Overview of technologies used (Android, Java, network libraries, backend).
- Simplified project structure overview.
- Basic setup instructions for development.
- Mention of the required backend server for multiplayer.
- Instructions on how to play both modes.
- Author information.
